CN211930266U

CN211930266U - Reactive automatic compensation device for charging station

Info

Publication number: CN211930266U
Application number: CN202020905220.XU
Authority: CN
Inventors: 罗红宇
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-05-26
Filing date: 2020-05-26
Publication date: 2020-11-13
Anticipated expiration: 2030-05-26

Abstract

The utility model discloses a reactive automatic compensation device of a charging station, which comprises a main circuit and a secondary circuit, wherein the main circuit comprises a first reactor, a second reactor, a first capacitor, a second capacitor and a third capacitor; the first reactor, the second reactor, the first capacitor, the second capacitor and the third capacitor are electrically connected in parallel; the secondary circuit comprises a power factor converter, a PLC (programmable logic controller) and a plurality of high-voltage current transformers, wherein the high-voltage current transformers are electrically connected with the power factor converter, and the power factor converter is electrically connected with the PLC; the utility model discloses an use the electric current and the voltage of controller collection transformer, calculate reactive compensation's scheme through the controller, carry out effectual electric energy quality management to the system, consequently the utility model discloses but wide application in electrical equipment.

Description

Reactive automatic compensation device for charging station

Technical Field

The utility model relates to an electrical equipment field specifically indicates the reactive automatic compensation device of charging station.

Background

Along with electric automobile's rapid development, the influence of charging station to electric power system electric energy quality is bigger and bigger, and the reactive power compensator of charging station also receives extensive concern more and more, especially when electric automobile charging station direct current fills the charging load of electric pile and is in idle reactive power compensation for a long time, needs a safe and reliable's reactive power generator with low costs, as reactive power's compensation scheme, consequently research and development charging station reactive power automatic compensation device has important realistic meaning.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model discloses a reactive automatic compensation device of a charging station, which comprises a main circuit and a secondary circuit, wherein the main circuit comprises a first reactor branch, a second reactor branch, a first capacitor branch, a second capacitor branch and a third capacitor branch;

the first reactor branch comprises a first reactor, the second reactor branch comprises a second reactor, the first capacitor branch comprises a first capacitor, the second capacitor branch comprises a second capacitor, and the third capacitor branch comprises a third capacitor;

the first reactor leg, the second reactor leg, the first capacitor leg, the second capacitor leg, and the third capacitor leg are electrically connected in parallel;

the secondary circuit comprises a power factor converter, a PLC (programmable logic controller) and a plurality of high-voltage current transformers, wherein the high-voltage current transformers are electrically connected with the power factor converter, and the power factor converter is electrically connected with the PLC.

Further, the first reactor branch circuit further comprises a first miniature circuit breaker, a first solid-state relay and a first thermal relay, and the first miniature circuit breaker, the first solid-state relay, the first thermal relay and the first reactor are sequentially and electrically connected in series.

Further, the second reactor branch circuit further comprises a second miniature circuit breaker, a second solid-state relay and a second thermal relay, and the second miniature circuit breaker, the second solid-state relay, the second thermal relay and the second reactor are sequentially and electrically connected in series.

Further, the first capacitor branch circuit further comprises a third miniature circuit breaker, a first switching capacitor contactor and a third thermal relay, and the third miniature circuit breaker, the first switching capacitor contactor, the third thermal relay and the first capacitor are sequentially connected in series and electrically.

Further, the second capacitor branch circuit further comprises a fourth miniature circuit breaker, a second switching capacitor contactor and a fourth thermal relay, wherein the fourth miniature circuit breaker, the second switching capacitor contactor, the fourth thermal relay and the second capacitor are sequentially connected in series and electrically.

Further, the third capacitor branch circuit further comprises a fifth miniature circuit breaker, a third switching capacitor contactor and a fifth thermal relay, wherein the fifth miniature circuit breaker, the third switching capacitor contactor, the fifth thermal relay and the third capacitor are sequentially connected in series and electrically.

Further, the main line further includes an arrester electrically connected in parallel with the first reactor branch, the second reactor branch, the first capacitor branch, the second capacitor branch, and the third capacitor branch, respectively.

Further, the secondary circuit further comprises a key switch, and the key switch is electrically connected with the PLC.

The utility model discloses an use electric current, the voltage signal of controller collection transformer high-voltage side, calculate through the controller, calculate reactive compensation's scheme, carry out effectual electric energy quality management to the system, solved electric automobile charging station direct current and filled the charging load of electric pile and be in the reactive compensation's when empty for a long time difficult problem.

Drawings

FIG. 1 is a main wiring diagram of an embodiment of the present invention;

fig. 2 is a secondary circuit diagram of the embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments, but it should be noted that the figures, technical and scientific terms, technical methods and the like mentioned in the following embodiments are only used for better description and explanation of the present invention, and are not intended to limit the present invention, and the protection scope of the present invention is not limited thereto.

As shown in fig. 1-2, the reactive automatic compensation device for the charging station comprises a main grid bus, a first grid bus L1, a second grid bus L2, a third grid bus L3, a grid zero line N, a grid ground line PE, a main line and a secondary line, wherein the main grid bus is electrically connected with the first grid bus L1, the second grid bus L2 and the third grid bus L3 respectively, and the main line comprises a first reactor branch, a second reactor branch, a first capacitor branch, a second capacitor branch and a third capacitor branch;

the first reactor branch comprises a first miniature circuit breaker QF1, a first solid-state relay K1, a first thermal relay FR1 and a first reactor I1, and the first miniature circuit breaker QF1, the first solid-state relay K1, the first thermal relay FR1 and the first reactor I1 are sequentially and electrically connected in series;

the second reactor branch comprises a second miniature circuit breaker QF2, a second solid-state relay K2, a second thermal relay FR2 and a second reactor I2, and the second miniature circuit breaker QF2, the second solid-state relay K2, the second thermal relay FR2 and the second reactor I2 are sequentially and electrically connected in series;

the first capacitor branch comprises a third miniature circuit breaker QF3, a first switching capacitor contactor KM1, a third thermal relay FR3 and a first capacitor C1, and the third miniature circuit breaker QF3, the first switching capacitor contactor KM1, the third thermal relay FR3 and the first capacitor C1 are sequentially and electrically connected in series;

the second capacitor branch comprises a fourth miniature circuit breaker QF4, a second switched capacitor contactor KM2, a fourth thermal relay FR4 and a second capacitor C2, and the fourth miniature circuit breaker QF4, the second switched capacitor contactor KM2, the fourth thermal relay FR4 and the second capacitor C2 are sequentially and electrically connected in series;

the third capacitor branch comprises a fifth micro circuit breaker QF5, a third switched capacitor contactor KM3, a fifth thermal relay FR5 and a third capacitor C3, and the fifth micro circuit breaker QF5, the third switched capacitor contactor KM3, the fifth thermal relay FR5 and the third capacitor C3 are sequentially and electrically connected in series;

the idle end of the first miniature circuit breaker QF1, the idle end of the second miniature circuit breaker QF2, the idle end of the third miniature circuit breaker QF3, the idle end of the fourth miniature circuit breaker QF4 and the idle end of the fifth miniature circuit breaker QF5 are electrically connected in parallel and then electrically connected with the main power grid bus, and in order to improve the safety of the whole system, the main miniature circuit breaker QF can be additionally arranged between the main line and the main power grid bus.

The secondary circuit is provided with a power factor converter, a PLC controller and a 24V stabilized voltage power supply;

the Power factor converter is provided with Ia, Ua, Ia, Ib, Ub, Ib, Ic, Uc, Ic, Un, OUT1, OUT2 and Power ports;

the port Ia is electrically connected with a first high-voltage current transformer 1TAa, the port Ib is electrically connected with a second high-voltage current transformer 1TAb, and the port Ic is electrically connected with a third high-voltage current transformer 1 TAc;

the Ua port is electrically connected with a first fuse FU1, the Ub port is electrically connected with a second fuse FU2, and the Uc port is electrically connected with a third fuse FU 3;

the Ua port is used for sensing the secondary side voltage of the first grid bus L1, the Ub port is used for sensing the secondary side voltage of the second grid bus L2, the Uc port is used for sensing the secondary side voltage of the third grid bus L3,

the Un port is electrically connected with a power grid zero line N;

the PLC controller is provided with IN1 ports, IN2 ports and 00 ports, an OUT1 port of the power factor converter is electrically connected with an IN1 port of the PLC controller, and an OUT2 port of the power factor converter is electrically connected with an IN2 port of the PLC controller;

the 00 port is electrically connected with a 24V voltage-stabilized power supply through a button KKKKKK;

the Power interface of the Power factor converter is respectively electrically connected with a first Power grid bus L1 and a Power grid zero line N, the L port of the PLC is electrically connected with a first Power grid bus L1, and the N port of the PLC is electrically connected with the Power grid zero line N;

the main line further comprises an arrester FYS, and the arrester FYS is respectively connected with the first reactor branch, the second reactor branch, the first capacitor branch, the second capacitor branch and the third capacitor branch in parallel and electrically.

The utility model discloses can settle when the assembly in equipment such as electric capacity cabinet, regulator cubicle or compensation cabinet, according to the in-service use condition, the user can dispose not unidimensional electric capacity cabinet, regulator cubicle or compensation cabinet by oneself.

The above embodiments are only embodiments of the present invention, and any changes and substitutions without inventive labor in the claims of the present invention are within the scope of the present invention.

Claims

1. The reactive automatic compensation device of the charging station is characterized by comprising a main circuit and a secondary circuit, wherein the main circuit comprises a first reactor branch, a second reactor branch, a first capacitor branch, a second capacitor branch and a third capacitor branch;

2. The charging station reactive automatic compensation apparatus of claim 1, wherein the first reactor branch further comprises a first miniature circuit breaker, a first solid state relay, and a first thermal relay, the first miniature circuit breaker, the first solid state relay, the first thermal relay, and the first reactor being electrically connected in series in that order.

3. The charging station reactive automatic compensation apparatus of claim 1, wherein the second reactor branch further comprises a second miniature circuit breaker, a second solid state relay, and a second thermal relay, the second miniature circuit breaker, the second solid state relay, the second thermal relay, and the second reactor being electrically connected in series in that order.

4. The charging station reactive automatic compensation apparatus of claim 1, wherein the first capacitor branch further comprises a third miniature circuit breaker, a first switched capacitor contactor, and a third thermal relay, the third miniature circuit breaker, the first switched capacitor contactor, the third thermal relay, and the first capacitor being electrically connected in series in that order.

5. The charging station reactive automatic compensation apparatus of claim 1, wherein the second capacitor branch further comprises a fourth miniature circuit breaker, a second switched capacitor contactor, and a fourth thermal relay, the fourth miniature circuit breaker, the second switched capacitor contactor, the fourth thermal relay, and the second capacitor being electrically connected in series in that order.

6. The charging station reactive automatic compensation apparatus of claim 1, wherein the third capacitor branch further comprises a fifth miniature circuit breaker, a third switched capacitor contactor, and a fifth thermal relay, the fifth miniature circuit breaker, the third switched capacitor contactor, the fifth thermal relay, and the third capacitor being electrically connected in series in that order.

7. The charging station reactive automatic compensation apparatus of claim 1, wherein the main line further comprises an arrester electrically connected in parallel with the first reactor branch, the second reactor branch, the first capacitor branch, the second capacitor branch, and the third capacitor branch, respectively.

8. The reactive automatic compensation apparatus of a charging station according to claim 1, wherein the secondary circuit further comprises a key switch, and the key switch is electrically connected to the PLC controller.